Dataset: Aggregate Sinking Velocity from the CO2 Aggregation Experiment from UCSB Marine Science Institute Passow Lab from 2009 to 2010 (OA - Ocean Acidification and Aggregation project)

Final no updates expectedVersion 07 May 2013 (2013-05-07)Dataset Type:Unknown

Principal Investigator, Contact: Uta Passow (University of California-Santa Barbara)

Co-Principal Investigator: Dr Alice L. Alldredge (University of California-Santa Barbara)

BCO-DMO Data Manager: Stephen R. Gegg (Woods Hole Oceanographic Institution)


Program: Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA) (SEES-OA)

Program: Ocean Carbon and Biogeochemistry (OCB)

Project: Will Ocean Acidification Diminish Particle Aggregation and Mineral Scavenging, Thus Weakening the Biological Pump? (OA - Ocean Acidification and Aggregation)

Series 2: CO2 Aggregation Experiment - Aggregate Sinking Velocity

The sinking velocities of ten randomly selected aggregates from each tank were measured
in a 2-liter cylindrical settling column that was 8 cm wide in a temperature constant room . Each
aggregate was allowed to sink out of the wide bore pipette into the settling column. The duration
of the descent of the aggregate over a distance of 20 cm, from 6 cm below the surface to 6 cm
above the bottom, was monitored using a stop watch. Just before this, the length and width of
each aggregate were measured to the nearest mm under a dissecting scope. Aggregate volume
was calculated based on an ellipsoid shape, assuming that width and depth were identical.

Reference: Passow, U., Rocha, C.L.D.L., Fairfield, C., Schmidt, K., 2014. Aggregation as a function of pCO2 and mineral particles. Limnology and Oceanography 59 (2), 532-547.


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